Well, here is our fourth idea.
It is just a revised version of our third idea.
Well, this idea will consist of two balloons. One being larger than the other. In the diagram, as you can see, the bottom balloon (being the smaller one) is the balloon that will make our car travel really fast since no straw is added. The top balloon (being the larger one) has a straw, within the balloon. This balloon will ensure that our car travel a greater distance. Some may say that two or more balloons almost seem to always fail, but this design will try to prove them wrong.
Also, instead of the wheels just moving, we have decided to add BBQ stick (which are attached to the wheels) within the straw so that the wheels and the axels will move at a coordinated time.
